// Copyright (C) 2000-2007, Luca Padovani <padovani@sti.uniurb.it>.
// 
// This file is part of GtkMathView, a flexible, high-quality rendering
// engine for MathML documents.
// 
// GtkMathView is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License as published
// by the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
// 
// GtkMathView is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
// 
// You should have received a copy of the GNU Lesser General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

#include <config.h>

#include "StringHash.hh"

size_t
StringHash::operator()(const String& s) const
{
  size_t h = 0;
  for (String::const_iterator i = s.begin(); i != s.end(); i++)
    {
      h = (h << 4) + *i;
      if (size_t g = h & 0xf0000000)
	{
	  h = h ^ (g >> 24);
	  h = h ^ g;
	}
    }

  return h;
}